Online Education For Gem Enthusiasts

  • 8,231 Members
  • 2,223 Articles
  • 146 Gemology Businesses
  • 152,939 Facebook fans

Become a Member

"IGS is a Godsend for me!"

- Charlie Bernheiser, IGS Member

"Thank you for the fantastic adventure!"

- John Parrot, IGS Member

Join Our Thriving Community

2,223 Articles
8,231 Members
146 Directory Listings

The world's best gem articles, published weekly.

Most Recent Articles

Gram Princess: Online Faceting Designs and Diagrams

Introduced in 1960, the classic princess by A. Nagy was an economical cut for flat diamond crystals. However, this popular design doesn’t lend itself very well to colored gemstones. The Gram Princess by Jeff Graham is a redesign of the princess cut suitable for saturated gems.

Sulfur Value, Price, and Jewelry Information

Although sulfur is very abundant, facetable material is not. Sulfur is also enormously difficult to cut and almost impossible to wear, so faceted pieces have some scarcity value for collectors of unusual gems.

Pearl Symbolism

Prized for millennia, pearls are organic gems with strong associations with the Moon, great value, and weddings. Learn more about pearl symbolism and the lore of the June birthstone.

Variscite Value, Price, and Jewelry Information

With beautiful green to blue-green colors and interesting patterns, variscite is a popular hobbyist material for cabochons.

Button: Online Faceting Designs and Diagrams

Inspired by faceted shell and mother of pearl buttons from the Roaring Twenties, the Button design by Jeff Graham is a simple cut perfect for large, lightly colored gemstones.

Watermelon Tourmaline Buying Guide

Looking for a fun summertime gem? Watermelon tourmaline adds a pop of color that’s perfect for a playful summer look. Learn about the quality factors for this gem in our watermelon tourmaline buying guide.

Become a Gemology Pro

  • Certification Course
  • A listing in our business directory
  • Access to our up-to-date gemstone value guide
  • Access to premium articles on tools and techniques
Sign up for a Pro Membership
"Becoming a Pro Member of IGS just made good sense for my business. The gemology resources are fantastic, and my profile lets potential customers know I am serious about colored gemstones. And frankly, if I get any exposure to potential customers it's a no-brainer."
Paul Bierker, Paul Michael Designs
Jeweler, IGS Pro Member

The world's best online resource for gemstone appraisal

Over 15 years, we have assembled detailed pricing and value information for appraising over 70 different gemstones. The values in our guide come from a variety of sources including primary and secondary gemstone dealers, jewelers, miners, and wholesale suppliers of commonly traded gemstones.

View the Price Guide

Take Your Passion for Gemstones to a Whole New Level

For as low as $3/month

See Plans & Pricing